Keysight (Agilent) DAQM908A 40-Channel Single-Ended Multiplexer Module

The Keysight DAQM908A is a 40-channel single-ended multiplexer module for high-density data acquisition in common-low applications. It plugs directly into DAQ970A and DAQ973A mainframes to enable simultaneous measurement and switching across up to 40 channels at scanning speeds of 100 channels/second. The module uses single-wire switching architecture with floating low connection, rated to 300 V isolation from earth ground. Screw terminal connections accept two-wire RTD and thermistor sensors as well as voltage measurements up to 300 V and 1 A loads, with 10 MHz bandwidth for signal fidelity.

– Technical Specifications

• Channels: 40 single-ended
• Module Type: Armature Switch Multiplexer
• Switching Type: Single-wire switching (common-low)
• Scanning Speed: Up to 100 channels/second
• Maximum Voltage: 300 V
• Current Rating: 1 A
• Bandwidth: 10 MHz
• Low Connection Isolation: Floating, up to 300 V from earth

– Key Features

• Screw terminal connections for secure wire termination
• Supports two-wire RTD and thermistor temperature sensors
• Handles voltage and temperature measurements (all two-wire internal measurements except current)
• High channel density reduces mainframe slot count in multi-module systems
• Fast channel-to-channel switching enables rapid sampling and data collection

– Typical Applications

• Battery testing and characterization
• Component electrical and thermal characterization
• Multi-point benchtop measurements
• Voltage and temperature scanning across large point counts

– Compatibility & Integration

Designed as a plug-in module for Keysight DAQ970A and DAQ973A Data Acquisition System Mainframes.